Diagnostic Procedure

DIAGNOSTIC PROCEDURE



1. CHECK FOR SPARK.
^ If OK proceed to step 2.
^ If not OK proceed to step 4.
2. CHECK FOR OPEN AND SHORT IN IGF SIGNAL CIRCUIT BETWEEN IGNITER AND ENGINE CONTROL MODULE.
^ If OK proceed to step 3.
^ If not OK repair or replace harness or connector.
3. CHECK VOLTAGE OF TERMINAL IGF.
^ If OK replace igniter.
^ If not OK check and replace ECM.
4. CHECK VOLTAGE OF TERMINAL IGT.
^ If OK proceed to step 5.
^ If not OK proceed to step 8.
5. CHECK VOLTAGE OF IGNITER POWER SOURCE.
^ If OK proceed to step 6.
^ If not OK check and repair igniter power source circuit.
6. CHECK FOR OPEN AND SHORT IN PRIMARY COIL CIRCUIT.
^ If OK proceed to step 7.
^ If not OK repair or replace harness or connector.
7. CHECK IGNITION COIL.
^ If OK replace igniter.
^ If not OK replace ignition coil.
8. CHECK VOLTAGE OF TERMINAL IGT (DISCONNECT IGNITER CONNECTOR).
^ If OK replace igniter.
^ If not OK proceed to step 9.
9. CHECK FOR OPEN AND SHORT IN IGT SIGNAL CIRCUIT BETWEEN IGNITER AND ENGINE CONTROL MODULE.
^ If OK check and replace ECM.
^ If not OK repair or replace harness or connector.